The T&S Brass B-0455-04-963VB Vacuum Breaker Assembly is designed for reliable performance in various plumbing applications. It features a 4-1/4" center mounting for easy installation and comes with 1/2" NPT male threads for secure connections. The assembly includes angled slip flanges (B-0461) for enhanced versatility. Constructed with low lead materials, it meets NSF standards, ensuring safety and compliance in potable water systems. This vacuum breaker effectively prevents backflow, protecting your water supply from contamination.